EBS does provide block level storage replication in the event of node/hardware failures however if you would like have this backup outside of Amazon, this is standard issue and I have written perl scripts and shell scripts to provide this functionality.
I have been using Amazon cloud services and supporting the environments for the past 3 years or so in high availability high traffic environments.
I am a Freelancer member, have completed projects, and have excellent reviews.
Thank you,
Ronald L. Johnson
925.255.5308